Scraper for harrow disks and means for operating the same



Nov. 8, 1927. 1,648,381

J. FLATLEY SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THE SAMEFiled June 16. 1924 4 Sheets-Sheet l 2 I a a 20 f G 3 o n 5 0 a 17 4 172 a u 16 4 E1 .,H n a 7 9 J a a 16 B i 9 a 7 B I m T a F n I I 0 I u I f6 u 17 z 0 3 J 17 17 1 17 INVENTOR. Jplm HFJatZs y,

A TTORNE Y.

Nov. 8, 1927. 1,648,381

7 J. H. FLATLEY SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THESAME Filed June 16, 1924 4 Sheets-Sheet INVENTOR. Jbfizz [if/4227a y,

A TTORNE Y.

Nov. 8, 1927. 1,648,381

J. H. FLATLEY SCRAPER FOP HARROW DISKS AND MEANS FOR OPERATING THE SAMEFiled June 16. 1924 4 Sheets-Sheet 3 INVENTOR. fihnHFlatZay,

syafizzm ATTORNEY.

Nov. 8, 1927. 1,648,381

J. H. FLATLEY v SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THESAME Filed June 16, 1924 4 Sheets-Sheet 4 attoz no, 1

Patented Nov. 8, 1927.

Joann, FLAILEY, or LITTLE YORK, .rLLnvoIsJ.

J sonAr R roe nan-now ris s Ann Means roaornnarinornasann.

Application filed iune 1c, I I

My invention relates to improvements in disk harrows. Moreparticularlygthe inven tion pertains to improvements in scrapers forharrow disks and to mechanism for oper ating the same. One of theobjects of my invention is to produce a scraper of apeculiarly differentfornrfrom any of whichl am aware. Further, to present a working'e'dgethereof to the disk-surface in an entirely different manner, and in suchmanner that said disk can be readily and properly cleanedunder anyconditions that may exist; d

Another object is that in presenting the scraper to its work the'dirtwill be removed progressively fromra point nearest the center ofdisk-rotation, for example, toward the perimeter of the disk to the endthat the draft upon the implement will not be suddenly increased. Thatis to say, rather than force a set of the scrapers into the entire bulkof the adhering matter on a series of disks, and thus suddenly increasethe draft,

- it is my purpose to so construct the scrapers that agradual removalwill take place, the Inaterial'being removed in a spiral cutuntil all isremoved. But this will be made clear in the description to follow.

Still another object is to provide for maintaining the scrapers inyielding contact'with the disks and tolemploy a flexible member for eachscraper adjustable with respect to a common operating member controllinga K series of such scrapers.

A still furtherobject is to furnish a mechanism for controlling all ofthe scrapers v wherein sets of the latter may be selective- 137presented to the disks.

The appended drawings'illustrate my in vention in its preferred formthough it is to be understood that the structures shown are susceptibleof changes such as may be considered to ,lie within the invention andwithin the scope of the claims herein.

, Figure 1 is a plan of a disk harrow showing my invention appliedthereto.

Figure 2 is'a rear elevation of a scraper of my invention showing itsconvex side.

Figure 3is a side elevation of the scraper as seen from its concaveside.

EF' e 4B i a showing its concave form, r I

Figurefi showsthe scraper in perspective view at its front supportededge,

1924. 'seri i'no; 720,239.

Figure 6 is a side elevation of a portion of if a harrow disk showingthe location of a scraper with respect thereto." f I Figure 7 shows aportion of a disk as viewed from above, a second disk in horizontalsection, and a scraper showingits possible positions with respect tobothidisks.

Figure 7 is'a section of part of a disk in Figure 1.

Figure 9 is a rear elevation of the same.

Figure '10' shows, in perspective,v "certain" method of removal hasnot'b'een found to answer. Experience has shown that, tl ie dirt undersome conditionswill accumulate or andscraper taken oi linef Figure 6. r

F igure 8 IS a plan 1n detail of parts shown buildup between thescrapers anddisks i forc g the f rmer away from,workingcontactl Again,when a scraper of the conimon'type is new there is asharp edge or cornerin contact with theidisk' which'cleans properly;

under'ideal soil conditions. However, -S 1IlC6' the scraper body lies atan acute, angle to the disk-surfacesaid edge orwcorner is final-H lyworn to a bevel and simulates a chisel-end whereuponlt fails toproperly, function since there is then no abrupt corner to act as a.

scraper should. When this condition obtams, the operator must remove allof the scrapersand restore their edges to the c n;

dition when first applied;

It is my. purpose, in view of the above, to so constructasc'raper and toso present it to the disk that a clean scraping action will bemaintained indefinitely without attention.

This, however, will be made clear as "the I descriptionproceeds,including other advan front elevation of the same l tages ofmyinvention.

of a disk harrow, 2 the tongueor draft mem e", Wh @1 nd a e t rra n mems below which are located disk-gangs jour naled in any usual and wellknown manner,

' members-3, for example, as clearly shown Ill in Figures 3, 8 and 9 arethe stems or shafts 7 of scraper-blades 8, figuresQ to 7 inclusive,

suchstems or shafts being disposed between the several disks 9 in thepositions most convenient for the required operation. Said blades areproperly rights and lefts in order to engage the concave surfaces of ther disks of the gangs as placed.

. The form of the scrapers is illustrated in theseveral figures, 2 to 7inclusive, the general outline being madeclear in Figure 3. One edge issecurely bolted to the stem 7 while an opposite edge 11, beforethelblade bent into the form shown, and to be described, issubstantially parallel to the bolted edge. The top edge 10 is slightlycurved from the'stem 7 as shown in plan in Figure 7 and continues intothe edge 11, the latter ybeing the actual working edge to have contactwith the disk. It is noted that said edge 11, Figures 2 and 5 isspirally formed,

the general line of which lies at an angle to the axis of the stern asviewed in planes at right angles to each other and at an angle,

face in the position shown.

therefore, to the axis of swinging movement of the blade. The generalform of the scraper-blade may be likened to a longitudinal section of ahollow cone since it is bent from a small curve, at 12, Figure 3, suchcurve gradually spreading to longer curves. as denoted by the shadelines in said figure, v This is with the whole purpose of creating thespiral edge 11 presented to the disk-sur- The face of the blade lies atright angles to the, said disksurface as shown in Figure 7 the edge 11lying squarely upon such surface, the arrow in this figure showing orindicating the direction of disk rotation. Clearly, the wear of the diskon the scraper" is at right angles to whatfmay be termed the plane ofthe scraper and the edge 11 never changes its.

form, the proper scraping action being maintained indefinitely. Inpresentmg the edge 11 to the disk the lower corner of said edge firstengages the adhering matter nearest the disk center and in a continuedmovement toward a full contactprogressively removes the material in aspiral cut outward toward the perimeter of the disk, this progressiveengagement of the scraping edge with the disk surface is due primarilyto the shape of the scraper, the angle of the edge 7 11 with respect tothe disk surface and pivotal mounting of the blade, and the 'man- I ner'in which thescraper is moved into ongagementwith the diskf As shown inFig.

'7, it will be apparent that movement of the about-axis 7 willcause saidedge port-ion to move to aiposition obliquely across the disc surfaceand progresslvely'engag'e the ent1re edge 11 therewith. The advantage ofthis action is that when an entire series of scrapers is moved toscrapingposition the entire load of material is not suddenly attacked,since to do so, especially when the soil is of a sticky or gummy nature,would greatly increase the draft on the implement.

The-form of the scraper and the position in which it may be mounted isadvantageous in that, as shown in Figure 7, the edge 11 can be made toengage the outer or convex surface of an adjacent disk and remove thedirt from that part of said surface that prevents proper functioning ofsaid disk in the soil. The dotted lines a a in said Figure 7 designatessubstantially the zone of scraping action, The position of the stem 7between the disks may vary according to the form of the scraper auditsability to serve in both the capacities named. v p I There is includedwith the several scrapers a control mechanism by which I am enabled,preferably, to operate certain set-sor series of said scrapers, theothers being allowed to remainidle; To this end there is journaled uponthe tongue or draft device 2 a rock-shaft 13. This lies along saidtongue and has a pair of upstanding arms 14L and 15 disposed somewhat inthe rear of the positions of the gangs 5. V Secured to the upper end ofeach stein7 is an arm 16preferably capable of flexingfand may be made,therefore, of spring metal. These lie substantially parallel to oneanother, having reference, of course, to those of a given series, andeach is pivotally connect edto a bar 17. Connected to said bar by apivot bolt 17 for eXa1'nple,:is.a link 17 2 one end of which is slottedto receive one of the arms 14, At the point of pivotal con-. nection ofthe arm 16 with the bar 17 the latter is slotted as at18, Figure 8,whereby, an adjustment of the said arm may be made. withrespect to suchbar. By a study of Figure 1 it will be seen that twoof the bars arecontrolled by each of the arms 14:, 15 of the rock-shaft. As arranged,it is clear that if the rod 13 is rocked so as to swing the arms 14, 15toward the right, for example, the left front bar 17 andthe right rearbar 17 will both be shifted toward the right,.the other two bars 17being unaffected. Similarly, in the movement of the said rod 13 toswingthe' said arms 14:, 15 toward the left the right forward and theleft rearward bars 17 -will b Operated without movement of the othertwo. In use, all of the scrapers are preferably kept free oftthe disks,though, of course, this need not be followed necessarily. However,i'fInorm'ally'out of contact and it is necessary to clean the disks itis preferable to operate two of the series of scrapers at a time only.That is to say, the front series at the the rock-shaft is moved in onedirection the two series of sorapersfirst namechfor example, maybe'actua'ted, while an opposite dlrec' tion of movementwill aii'ect theother two.

series. find an extreme movement in either tlii'ec'tionavill result inthe scrapers acting upon the convex suriaces of adjacent disks asexplained earlier. I

A hand "lever 20 on the rock-shaft serves to impart movement thereto andmay be set in a desired fixed position by any'usual or well known latcharrangement 21, this being sutiiciently well knownto require no.detailed drawing thereof. 1

In assembling the scrapers upon the implement their arms 16 maybeadjusted to proper positions on the bars 17 to the end that the scraperswill have the proper relation to their respective disks and so that,when the lever 20 is fixed by the latch mechanism mentioned, they willhave the desired yielding contact under all conditions.

In Figures 11 and 12 is shown a modified form of scraper operatingmechanism wherein 121 is a hand-lever suitably pivoted at 22 on thetongue 2, for example. One end of the lever is made flexible by twistinga flat portion 23 in a vertical plane so as to lie perpendicularly tostresses to be placed upon it to be understood later. This end of saidlever is pivoted to one end of a short lever 24 pivoted between its endsat 25 on the said tongue. At 26 is a similar short lever also pivotedbetween its ends on the tongue at 27. This is spaced from the lever 24,and an in termediate' lever 28 is pivoted at its middle and has pivotalconnection at its endswith adjacent ends of the short levers as shown.In the present instance each of the bars 17 that control the scrapers isattached to one of theends of the two levers24e and 26. It will be seenthat the lever system is such that. when the hand lever 21 is movedtoward the right, Figure 11, the short lever 24 will'be swung toward theleft atits forward end and.

toward the right at its rear end. This "action shifts the bars 17 ofthat lever in oppo site directions and carrying the scrapers of thefront pair of gangs .towardthe'concave sides of the disks of thosegangs. 5 Due to the connection of the lever 2.8, ithe rearshortlever 26will be. swung on itsipivot inthesame way, it being noted'th'atthe rearbars 17 are in positions opposite tlioseofthe' front bars so that'asshown by-the arrows both said rear bars are'shitted outwardly whereasthe front ones are drawn inwardly ortoward the tongue whichmust resultfrom the :factthat the front and rear gangs arereversed as to thepositions of their disks; Though not illustrated, it is clear that theremust be sutiicienttreedom of thepivot points of the lovers where theyconnect with one-anotherto .permit those points .to move in arcsdescribed from the-pivots of said levers. I t

Aquadrant or sector 29' is provided "for the lever '21 and any usuallatch mechaniSm 30 18811113103 86; whjerebyythesaid lever 21 may be.tixed'in a givenor desired. position.

Flexibility between the lever 21 and the mechanism operated that member.permits the scrapers to yieldto accommodate then'iselves'to'thecondition of adhering-matter on the disks, or in case obstruct-ionsshould pass between the disks and said scrapers. The lever-2'1 madeflexible, or any equivalent thereof, may be used in lieu of the arms 16or'in connection therewith.

This form of. mechanism admits otfoper- 'ating all of the scrapers intheir proper directions to a greater or lessextent, as may be desired,simultaneously with a single adjustment of the lever 21 as difiering:trom

the type first described.

I claim: 1. The combination with a harrow having a rotary harrow disk,of a scraper blade pivotally mounted on said harrow and movable into andout of engagement with said disk, said blade being curved and having ascraping edge disposed at an angle with respect to the pivotal axisofsaid blade,and means for ins pivotally mounted on said harrow and'movable into and out of engagement with said disk, said blade beingcurved and having a scraping edge disposed at an angle with respect tothe pivotal axis of said blade as' viewed in two different planes, andmeans for swinging said 1 blade to 'engage said scraping edge with saiddisk at an angle with respect to a radius of said disk, said scrapingedge atone endfirst engaging said r disk and then progressively engagingat its entire edge therewith as it reaches an oblique position withrespect to the radius of said disk.

3. The combination with a harrow having a rotary harrow disk, of ascraper blade piv-' otally mounted on said harrow and movable into'andout of engagement with said disk,

said blade having a substantially spirally curved scraping edge disposedat an angle with respect to the pivotal axis of said blade as viewed inplanes at right angles to each other, and means for swinging said bladeto engage said scraping edge at substantially right angles tot-hesurface of the disk scraper blades pivotally mounted between pairs ofadjacent disks, each of said blades being curved and movable into andout of engagement with the convex and concave surfaces of adjacentdisks, each scraping blade being curved and having a scraping edgedisposed at an angle with respect to the pivotal axis of said blade, andmeans for i at one end first engaging its respective disk and thenprogressively engaging at its entire edge therewith as it reaches anoblique position with respect to the radius .of said disk. r I r e 5.The combination in a harrow comprising amain frame and two pairs ofopposed gangs of harrowing disks, of a series of scraper-blades for eachsaid gang of disks journaled in the frame, each blade includthe scrapersof a gang, all of the arms of a gang of scrapers being connected to amember, and a common operating rod opera-- tively connected to theseveral members, the relation of the said rod and membersv being suchthat certain of the blades are selectively 5 exclusion of others inagiven operated to the movement. 7

In testimony whereof I affix my signature.

JOHN H. 'FLATLEY.

lng an arm, a separate member for all of

